[clang] [Clang][AArch64] Warn when calling streaming/non-streaming about vect… (PR #79842)

[Dinar Temirbulatov via cfe-commits]

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@@ -12230,12 +12230,22 @@ bool Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD,
   }
 
   // Check if the function definition uses any AArch64 SME features without
-  // having the '+sme' feature enabled.
+  // having the '+sme' feature enabled and warn user if sme locally streaming
+  // function returns or uses arguments with VL-based types.
   if (DeclIsDefn) {
     const auto *Attr = NewFD->getAttr<ArmNewAttr>();
     bool UsesSM = NewFD->hasAttr<ArmLocallyStreamingAttr>();
     bool UsesZA = Attr && Attr->isNewZA();
     bool UsesZT0 = Attr && Attr->isNewZT0();
+
+    if (UsesSM) {
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dtemirbulatov wrote:

Done.

https://github.com/llvm/llvm-project/pull/79842